Re: [PATCH v4 2/3] mm: document locking restrictions for vm_operations_struct::close
From: Michal Hocko <mhocko@suse.com>
Date: 2021-12-09 08:56:03
Also in:
lkml
On Wed 08-12-21 13:22:10, Suren Baghdasaryan wrote:
Add comments for vm_operations_struct::close documenting locking requirements for this callback and its callers. Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
quoted hunk ↗ jump to hunk
--- include/linux/mm.h | 4 ++++ 1 file changed, 4 insertions(+)diff --git a/include/linux/mm.h b/include/linux/mm.h index a7e4a9e7d807..b9b88ba7564b 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h@@ -577,6 +577,10 @@ enum page_entry_size { */ struct vm_operations_struct { void (*open)(struct vm_area_struct * area); + /** + * @close: Called when the VMA is being removed from the MM. + * Context: User context. May sleep. Caller holds mmap_lock. + */ void (*close)(struct vm_area_struct * area); /* Called any time before splitting to check if it's allowed */ int (*may_split)(struct vm_area_struct *area, unsigned long addr);-- 2.34.1.400.ga245620fadb-goog
-- Michal Hocko SUSE Labs